import useEmblaCarousel, {type UseEmblaCarouselType} from 'embla-carousel-react'
import {ArrowLeft, ArrowRight} from 'lucide-react'
import * as React from 'react'

import {Button, ButtonProps} from '@/shadcn-components/ui/button'
import {cn} from '@/shadcn-lib/utils'

type CarouselApi = UseEmblaCarouselType[1]
type UseCarouselParameters = Parameters<typeof useEmblaCarousel>
type CarouselOptions = UseCarouselParameters[0]
type CarouselPlugin = UseCarouselParameters[1]

type CarouselProps = {
	opts?: CarouselOptions
	plugins?: CarouselPlugin
	orientation?: 'horizontal' | 'vertical'
	setApi?: (api: CarouselApi) => void
}

type CarouselContextProps = {
	carouselRef: ReturnType<typeof useEmblaCarousel>[0]
	api: ReturnType<typeof useEmblaCarousel>[1]
	scrollPrev: () => void
	scrollNext: () => void
	canScrollPrev: boolean
	canScrollNext: boolean
} & CarouselProps

const CarouselContext = React.createContext<CarouselContextProps | null>(null)

function useCarousel() {
	const context = React.useContext(CarouselContext)

	if (!context) {
		throw new Error('useCarousel must be used within a <Carousel />')
	}

	return context
}

const Carousel = React.forwardRef<HTMLDivElement, React.HTMLAttributes<HTMLDivElement> & CarouselProps>(
	({orientation = 'horizontal', opts, setApi, plugins, className, children, ...props}, ref) => {
		const [carouselRef, api] = useEmblaCarousel(
			{
				...opts,
				axis: orientation === 'horizontal' ? 'x' : 'y',
			},
			plugins,
		)
		const [canScrollPrev, setCanScrollPrev] = React.useState(false)
		const [canScrollNext, setCanScrollNext] = React.useState(false)

		const onSelect = React.useCallback((api: CarouselApi) => {
			if (!api) {
				return
			}

			setCanScrollPrev(api.canScrollPrev())
			setCanScrollNext(api.canScrollNext())
		}, [])

		const scrollPrev = React.useCallback(() => {
			api?.scrollPrev()
		}, [api])

		const scrollNext = React.useCallback(() => {
			api?.scrollNext()
		}, [api])

		const handleKeyDown = React.useCallback(
			(event: React.KeyboardEvent<HTMLDivElement>) => {
				if (event.key === 'ArrowLeft') {
					event.preventDefault()
					scrollPrev()
				} else if (event.key === 'ArrowRight') {
					event.preventDefault()
					scrollNext()
				}
			},
			[scrollPrev, scrollNext],
		)

		React.useEffect(() => {
			if (!api || !setApi) {
				return
			}

			setApi(api)
		}, [api, setApi])

		React.useEffect(() => {
			if (!api) {
				return
			}

			onSelect(api)
			api.on('reInit', onSelect)
			api.on('select', onSelect)

			return () => {
				api?.off('select', onSelect)
			}
		}, [api, onSelect])

		return (
			<CarouselContext.Provider
				value={{
					carouselRef,
					api: api,
					opts,
					orientation: orientation || (opts?.axis === 'y' ? 'vertical' : 'horizontal'),
					scrollPrev,
					scrollNext,
					canScrollPrev,
					canScrollNext,
				}}
			>
				<div
					ref={ref}
					onKeyDownCapture={handleKeyDown}
					className={cn('relative', className)}
					role='region'
					aria-roledescription='carousel'
					{...props}
				>
					{children}
				</div>
			</CarouselContext.Provider>
		)
	},
)
Carousel.displayName = 'Carousel'

const CarouselContent = React.forwardRef<HTMLDivElement, React.HTMLAttributes<HTMLDivElement>>(
	({className, ...props}, ref) => {
		const {carouselRef, orientation} = useCarousel()

		return (
			<div ref={carouselRef} className='overflow-hidden'>
				<div
					ref={ref}
					className={cn('flex', orientation === 'horizontal' ? '-ml-4' : '-mt-4 flex-col', className)}
					{...props}
				/>
			</div>
		)
	},
)
CarouselContent.displayName = 'CarouselContent'

const CarouselItem = React.forwardRef<HTMLDivElement, React.HTMLAttributes<HTMLDivElement>>(
	({className, ...props}, ref) => {
		const {orientation} = useCarousel()

		return (
			<div
				ref={ref}
				role='group'
				aria-roledescription='slide'
				className={cn('min-w-0 shrink-0 grow-0 basis-full', orientation === 'horizontal' ? 'pl-4' : 'pt-4', className)}
				{...props}
			/>
		)
	},
)
CarouselItem.displayName = 'CarouselItem'

const CarouselPrevious = React.forwardRef<HTMLButtonElement, React.ComponentProps<typeof Button>>(
	({className, variant = 'outline', size = 'icon', ...props}, ref) => {
		const {orientation, scrollPrev, canScrollPrev} = useCarousel()

		return (
			<Button
				ref={ref}
				variant={variant as ButtonProps['variant']}
				size={size as ButtonProps['size']}
				className={cn(
					'absolute  h-8 w-8 rounded-full',
					orientation === 'horizontal'
						? '-left-12 top-1/2 -translate-y-1/2'
						: '-top-12 left-1/2 -translate-x-1/2 rotate-90',
					className,
				)}
				disabled={!canScrollPrev}
				onClick={scrollPrev}
				{...props}
			>
				<ArrowLeft className='h-4 w-4' />
				<span className='sr-only'>Previous slide</span>
			</Button>
		)
	},
)
CarouselPrevious.displayName = 'CarouselPrevious'

const CarouselNext = React.forwardRef<HTMLButtonElement, React.ComponentProps<typeof Button>>(
	({className, variant = 'outline', size = 'icon', ...props}, ref) => {
		const {orientation, scrollNext, canScrollNext} = useCarousel()

		return (
			<Button
				ref={ref}
				variant={variant as ButtonProps['variant']}
				size={size as ButtonProps['size']}
				className={cn(
					'absolute h-8 w-8 rounded-full',
					orientation === 'horizontal'
						? '-right-12 top-1/2 -translate-y-1/2'
						: '-bottom-12 left-1/2 -translate-x-1/2 rotate-90',
					className,
				)}
				disabled={!canScrollNext}
				onClick={scrollNext}
				{...props}
			>
				<ArrowRight className='h-4 w-4' />
				<span className='sr-only'>Next slide</span>
			</Button>
		)
	},
)
CarouselNext.displayName = 'CarouselNext'

export {type CarouselApi, Carousel, CarouselContent, CarouselItem, CarouselPrevious, CarouselNext}
